My theory about Mewtwo appearing in Genesect's movie seems to be more plausible.
Or at least this next thing is hinting at a appeance in the anime sometime soon.
http://www.pocketmonsters.net/ib/threads/3285
There are styluses based on Pokemon with recent important appearances.
Pikachu-Do you really have to guess why?
Eevee-Owned by one of Ash's rivals from the Unova Cup, who has a whole Team Eevee, with an unevolved Eevee as the leader.
Charizard-The poster for the N arc hints at Ash's Charizard making a return.
Dragonite-Iris' Dragonite. The stylus art even has the angry face.
Genesect-Presumably a main point within the new arc as hinted by the poster, as well as the star of the upcoming movie.
and....Mewtwo?
What has Mewtwo got to do with all of this? Is he to appear in the new arc in some way? Is he going to be a star of the upcoming movie?
IS MEWTWO VS. GENESECT GOING TO BE REAL?
One thing's for sure, no matter what happens, if Mewtwo wasn't extremely likely to return to Smash already, he is surefire for Smash at this point. Maybe Genesect will follow suit to drag their supposed rivalry there.
EDIT: And on a non Genesect or Mewtwo related note, I'm also willing to bet that Charizard and Dragonite are going to be rivals.
EDIT 2: Well, this one kind of furthers that point, with the two appearing on the same projector ball.
http://www.pocketmonsters.net/ib/threads/3288
But aside from that...is that....LUCARIO? Seems he isn't so likely to be removed if he's still so marketable. Although, there is the fact that another of Ash's rivals from the Unova Cup has a Riolu....and it's pretty much confirmed that it's going to evolve in two weeks during their battle.
Another interesting fact is that the Pokemon Smash! television show in Japan, which had formerly had the Zoroark costume replace the Lucario costume of the former Pokemon Sunday show, just recently re-replaced the two. That's right; Zoroark was replaced by Lucario on the show.
Could it really be that Mewtwo fans and Lucario fans finally don't have to worry anymore?